IS 14263:1995 ( Reaffirmed 2005 ) Indian Standard TAPERS FOR AGRICULTURAL PUMPING SYSTEMS -- SPECIFICATION UDC 621.643.412:631.347 ~ BIS 1995 BUREAU MANAK OF INDIAN STANDARDS MARG BHAVAN, 9 BAHADUR SHAH ZAFAR NEW DELHI 110002 hme 1995 Price Group 3 Pumps Sectional Committee, HMD 20 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Pumps Sectional Committee had been approved by the Heavy Mechanical Engineering Division Council. It has been recognised in IS 10804: 1994 `Recommended pumping system for agricultural purposes (second revision)' that the suction and delivery pipes should be properly sized for the pumping systems to be energy efficient. Tapers are used in pumping systems when the size of the suction piping or delivery piping is different than the suction or delivery size of the pump. To avoid entrapment of air in suction piping the flow cross section of the two ends are eccentric with reference to each other. The conical tapers for delivery piping have co-axial (concentric) flow cross section at the two ends. Details of tapers were earlier covered in IS 10804: 1994. It was recognized by the Pump Sectional Committee that tapers are distinctive items and frictional losses across the tapers to be regulated by standardization of the design dimensions in a separate product specification. Hence tapers were deleted from revised IS 10804. This standard is prepared incorporating relevant details from IS 1538:1976 `Specification for cast iron fittings for pressure pipes for water, gas and sewage (second revision)'. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2: 1960 `Rules for rounding off numerical values (revised)'. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS 14263:1995 Indian Standard TAPERS FOR AGRICULTURAL PUMPING SYSTEMS -- SPECIFICATION 1 SCOPE This standard lays down the requirements for the tapers used in agricultural pumping systems. This standard covers the cast iron tapers used both in the suction and delivery sides. The tapers used in the suction side are eccentric tapers and in the delivery side are concentric tapers. For connecting to the flanges of the pump end of the adjoining piping, the tapers may have either flanged ends or have socket-ends. 2 REFERENCES The following Indian Standards are necessary adjuncts to this standard: IS No. 210:1993 1538:1976 Title Grey iron castings @urth revision) Cast iron fittings for pressure pipes for water, gas and sewage (second revision) Cast iron and malleable cast iron flanges for general engineering purposes Recommended pumping system for agricultural purposes (second revision) Foot-valves, reflux valves or nonreturn valves and bore valves to be used in suction lines of agricultural pumping systems @rst revision) 4.2 Dimensions for Flanged Ends The dimensions of the flanged ends, appropriate to the size DN or dn shown in Tables 1 and 2, are recommended as per rating PN 1.0 of IS 6418:1971 or IS 10805:1986. However, different pattern of dimensions to match the adjoining connections are permitted. 4.3 Dimensions for Socket Ends The dimensions of the socket ends, both on the eccentric and the concentric tapers shall, unless otherwise agreed to between the users and the manufacturers, conform to those specified in IS 1538:1976, appropriate to the size ZW or dn, shown in Tables 1 and 3. 5 TESTING AND INSPECTION 5.1 Hydrostatic Pressure Testing 5.1.1 The accentrictapers used in suction side shall not reveal any leakage or sweating, when subjected to a hydrostatic test pressure of 0.2 MPa for 5 minutes. 5.1.2 The concentric tapers used in delivery side shall not reveal any leakage or sweating, when subjected to a hydrostatic test pressure of 1 MPa for 5 minutes. 5.2 Dimensions and Finish a) The tapers shall conform to the dimensional requirements specified in 4, within the limits of tolerances specified in IS 6418: 1971 or IS 10805 : 1986 for the dimensions of the flanged ends or IS 1538: 1976 for the dimensions of the socket ends. For facilitating good gasketting, the gasket-surfaces of the flanged ends shall have a surface finish of 125 rms maximum. 6418:1971 10804:1994 10805:1986 3 MATERIAL OF CONSTRUCTION The tapers shall be made of grey cast iron conforming to Grade FG 200 minimum of IS 210:1993. 4 DIMENSIONS 4.1 Dimensions for Eccentric Tapers and Concentric Tapers The dimensions for the eccentric tapers shall conform to those given in Table 1 and the dimensions for the concentric tapers shall conform to those given in Tables 2 and 3, b) 6 PAINTING The tapers shall be given a coating of tar or of a rust preventive paint. The coating shall however cover all tlte as-cast surfaces only. Table 1 Dimensions for Eccentric Tapers (Clauses 4.1,4.2 and4.3) All dimensionsin millimetres. B # R m u .. II t N "- 13 I . 12 + ECCENTRIC DOUBLE FLANGED TAPERS ODN i ECCENTRIC DOUBLE SOCKET TAPERS Large Diameter Nominal Size DNx dn 40x 25 DN ei 1, dn SmalI Diameter e2 1, 12 1 50X 40 50x 25 65x 50 65x 40 80x 65 80x 50 80x 40 100x 80 100X 65 Ioox 50 125x 100 125x 80 125x 65 125x 50 150x 125 150X 100 150x 80 40 50 50 65 65 80 80 80 100 100 100 125 125 125 125 150 150 150 9.0 9.5 9.5 9.5 9.5 10.0 10.0 10.0 10.5 10.5 10.5 11.0 11.0 11.0 11.0 12.0 12.0 12.0 39.0 40.0 40,0 41.5 41.5 43.0 43.0 43.0 45.0 45.0 45.0 47.5 47.5 47.5 47.5 50.0 50.0 50.0 25 40 25 50 40 65 50 40 80 65 50 100 80 65 50 125 100 80 9.00 9.00 9.00 9.50 9.00 9.50 9.50 9.CO 10.00 9.5 9,5 10.5 10.0 9.5 9.5 11.0 10.5 10.0 37.5 39.0 37.5 40.0 39.0 41.5 40.0 39.0 43.0 41.5 40.0 45.0 43.0 41.5 40.0 47.5 45.0 43.0 85.0 57.0 142.0 85.0 142.0 85.0 170.0 227.0 113.5 198.5 283.5 142.0 255.0 340.0 425.5 142.0 283.5 397.0 161.5 136.0 219.5 166.5 222.5 169.5 253.0 309.0 201.5 285.0 368.5 234.5 345.5 429.0 513.0 239.5 378.5 490.0 NOTES 1 Thevalues ofe, ande2have been calculated fromthe follotingrelationship and rounded up e,= ~ (7+0.02 DN); ez = : (7+ 0.02dn) .2 Thevalues ofl, and12havebeen calculated bythefolloting relationship 1,= 35+ 0.1 DN; /2= 35+ 0.1 dn. 3 The pertinent flangedimensionsas per IS 6418:1971, .. u 4 d 5 10°. IS 14263:1995 Tab1e2 Double FlangedTapers (Clauses 4.1 and 4.2) All dimensions in millimetres. 11 [2 el = = = 35 + 0.1 DN 35+0.1 ~ ~ G% (7 -F 0.02DN) (7+ 0.02 ah) ez = 11 13 1= I* I Large Diameter Small Diameter Mass (Approx) Nominal size DNxdn DN el [1 `ah e2 l'2 I kg 100 X 80 100 125 125 150 150 150 200 10.5 11.1 11.1 11.7 11.7 11.7 12.8 12.8 12.8 14.0 14.0 14.0 45 47.5 47.5 50 50 50 55 55 55 60 60 60 80 80 100 80 100 125 100 125 150 125 150 200 10.0 10.0 10.5 10.0 10.5 11.1 10.5 11.1 11.7 11.1 11,7 12.8 43 43 45 43 45 47.5 45 47.5 50 47.5 50 55 112 309.5 307.5 307 305 302.5 300 297.5 295 292.5 290 285 200 400 400 400 400 400 400 400 400 400 400 400 12 20 22 23 25 27 31 34 37 125 X 80 125 x1OO 150 X 80 150 Xloo 150 x125 200 x 100 200 X 125 200 X150 250 X 125 200 X150 200 X200 200 200 250 250 250 41 44 50 IS 14263:1995 Table 3 Double Socket Tapers (Clauses 4.1 and 4.3) All dimensionsin millimetres. el . = $(7 ; + 0.02 DN) (7 + 0.02A) e2 . 35+0.1 DN 1, 12 -- 35+o.ldn II ,2 I 13 I 12 I Large Diameter Nominal size DNx 100 X tf/L Small Dhmeter 11 dn e2 12 13 1 DN el Mass (Approx) kg 80 80 100 80 100 125 100 125 125 150 150 150 200 200 200 250 250 250 300 300 300 350 350 350 10,5 11.1 11,1 11.7 11,7 11.7 12,8 12.8 12.8 14.0 14,0 14.0 15.2 15,2 15.2 16.3 16.3 16.3 47.5 47'.5 47.5 50 50 50 55 55 55 60 60 60 65 65 65 70 70 70 80 80 100 80 100 125 100 125 150 125 150 200 150 200 250 200 250 300 10.0 10.0 10.5 10.0 10.5 43 43 45 43 45 47.5 45 47.5 50 47.5 50 55 50 55 60 55 60 65 185 232.5 227.5 280 275 270 320 315 305 360 350 340 445 435 430 430 425 420 275.5 323 320 373 370 367.5 420 417.5 410 467.5 460 455 560 555 555 555 555 555 -- -- -- -- -- -- -- -- 125 X 125 150 150 150 X X x X 11.1 10.5 11.1 11.7 11.1 11.7 12.8 11,7 12.8 14.0 12.8 14.0 15.2 200 x 100 200 x 125 200 x 150 250 x 125 250 X 150 250 X 200 300 300 300 350 350 350 x x X -- -- 150 200 250 200 250 300 -- -- x X x -- -- The machined surfaces shall be coated with a film of oil or varnish, so that the film, while providing rust-prevention during storage and transit shall not hinder good gasketting during installation. 7 MARKING a) b) Brand name or model manufacturer, and Sizes DN and dn in mm. name of the 7.2 Standard Marking 7.2.1 The tapers may also be marked 7.1 The tapers shall have the following markings either on a label or metal+late or as-cast: with the Standard Mark. 5 IS 14263:1995 7.2.2 The use of the Standard Mark is governed by the provisions of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of the Standard Mark maybe granted to manufacturers or producers maybe obtained from the Bureau of Indian Standards. 8 PACKING AND DESPATCH The gasket-faces of the flanged ends shall be adequately protected from suffering scratching, denting or damage during transit or storage. Except for this, the tapers may be dispatched loose or packed, as agreed to between the user and the manufacturer. 6 Burdau of Indian Standards BIS Is a statutory institution established under the Bureau ofkiian Standards Act, 1986 to promote harnionious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications maybe reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BLS. Revi6w of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of `BIS Handbook' and `Standards Monthly Additions'. This Indian Standard has been developed from Doc: No. HMD 20 ( 0005 ), Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telephones :3310131,3311375 Telegrams: Manaksanstha (Common to all offices) Regional Offices : Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002 : 1/14 C. LT. Scheme VII M, V. I. P. Road, Maniktola Telephone 3310131 { 3311375 378499,378561 378626,378662 603843 { 602025 2350216,2350442 2351519,2352315 { 632 % 95,6327858 { 6327891,6327892 Eastern CALCUTTA 700054 Northern: SCO 335-336, Sector 34-A, CHANDIGARH 160022 { Southern: C. I. T. Campus, IV Cross Road, MADRAS 600113 Western : Manakalaya, E9 MIDC,"Marol, Andheri (East) BOMBAY 400093 : AHMAO.A3.4~. .lAiPUR. KANPUR. B.A.~Cr.~ORE. Branches CO IMBATORE. FARIDABAD. BHOPAL. BHUBANESHWA.R. GHAZIABAD, GUWAHATI. HYDERABA.i2 PATNA. THIRUVANANTHAPURAM. Printed at Printograph, New Oelhl-5 (INDIA) LUCKNOW. NO. 1 MAY 1998 TO IS 14263:1995 TAPERS FOR AGRICULTURAL PUMPING SYSTEMS -- SPECIFICATION (Page 3,1Vote 1 ) ­ Substitute: 14 `el = - AMENDMENT (7+0.02DN)I 14 for `q =- (7*0.02DNY. 12 12 (Page 3,1Vote 4 ) ­ Substitute'= = 10°' for `d S1OO'. ( HMD 20 ) ReprographyUni$ BIS, New Delhi, India